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mcctrl: support remote CPU MSR read/write operations

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This commit is contained in:
Balazs Gerofi
2017-05-01 20:24:17 +09:00
parent 2d19ed9391
commit 9992fe0d72
7 changed files with 244 additions and 0 deletions
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24
kernel/include/syscall.h
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@ -78,6 +78,9 @@
#define SCD_MSG_PERF_CTRL 0x50
#define SCD_MSG_PERF_ACK 0x51
#define SCD_MSG_CPU_RW_REG 0x52
#define SCD_MSG_CPU_RW_REG_RESP 0x53
/* Cloning flags. */
# define CSIGNAL 0x000000ff /* Signal mask to be sent at exit. */
# define CLONE_VM 0x00000100 /* Set if VM shared between processes. */
@ -210,6 +213,18 @@ struct syscall_request {
unsigned long args[6];
};
struct mcctrl_os_cpu_register {
unsigned long addr;
unsigned long val;
unsigned long addr_ext;
};
enum mcctrl_os_cpu_operation {
MCCTRL_OS_CPU_READ_REGISTER,
MCCTRL_OS_CPU_WRITE_REGISTER,
MCCTRL_OS_CPU_MAX_OP
};
struct ikc_scd_packet {
int msg;
int err;
@ -235,6 +250,13 @@ struct ikc_scd_packet {
struct {
int ttid;
};
/* SCD_MSG_CPU_RW_REG */
struct {
struct mcctrl_os_cpu_register desc;
enum mcctrl_os_cpu_operation op;
void *resp;
};
};
char padding[12];
};
@ -412,6 +434,8 @@ int do_shmget(key_t key, size_t size, int shmflg);
struct process_vm;
int arch_map_vdso(struct process_vm *vm); /* arch dependent */
int arch_setup_vdso(void);
int arch_cpu_read_write_register(struct mcctrl_os_cpu_register *desc,
enum mcctrl_os_cpu_operation op);
#define VDSO_MAXPAGES 2
struct vdso {